It’s All About Tricks…
By Mr Wip
Because quick simple renders are often just enough…
While trying to evolve in the cruel world of virtual rendering, you may have seen many tutorials, all presenting super advanced master techniques, but you can’t stop feeling that their starting point is always a bit above your current skills, and their goal far away from your current needs. So, here is a small and quick way to get an efficient result with a minimal effort. The goal is to create a clean white model with some color overlay to express a projects potential.
The main part of the tutorial is based on the model ‘casino y torre’ from the 3D warehouse (made by Indigo Group), which presents interesting spaces that match well with the needs of the explanation.
We will be using SketchUp, V-Ray, and Photoshop.
The V-Ray presets are from the website wip-archi.com Link (It is in French, you can translate with Google translator).
The basic idea is to combine different method to get quickly a good result without having to spend too much time on each step, by adjusting everything precisely.
Step 1. So, after choosing a good point of view that presents the project well, it’s necessary to create first two main pictures, by using the V-Ray presets:
1 – White – Sun : All textures are overwritten, the light comes essentially from the sun, creating nice shadowing.
2 – White – Sky : All textures are overwritten, the light comes only from a sky dome, creating a smooth
uniform render with a good level of detail.
Step 2. The combination of both styles is necessary to get a convincing result because if the sun gives a good overall effect and nice shadows, it does kill the small details in full lit area which are preserved in the sky-only render. By using Photoshop it’s then easy to Blend them by adjusting the Transparency level of the overlaying picture (the order doesn’t matter…) as shown below.
Step 3. To emphasis the ‘clay model’ effect, it is necessary to add a simple black and white Adjustment Layer (or desaturate ) because the sun render always presents a small coloration. A Levels Layer is also useful to complete the picture adjustment allowing a quick reinforcement of the overall contrast.
It’s really important to see what can be done by the renderer and what can be done in the image editor, in order to keep the process as quick and as flexible as possible…
Step 4. When these first steps are done, go back to SketchUp, and export a simple white image, which only shows SketchUp lines (to get a satisfying precision image it is often necessary to create a bigger output than the V-Ray render and then reduce the size in the image editor).
Step 5. In Photoshop, paste the SketchUp lines as a new layer at the top of the existing stack. Then change the Blending Mode from Normal to Multiply. This creates the desired effect.
It is interesting to understand that this method is also really efficient to create clear plans or facades from any 3D model. The combination of sun and sky emphasis’s the nature of every space.
Using the same method the image below shows raw SketchUp to full render
When you have built your complete Photoshop file, you can easily enhance your presentation. As shown in the image below for example. Let’s show the facades and ground elements that will be affected by the project. Using the SketchUp lines layer, it’s possible to select precisely certain areas and then apply a color filling on another layer.
This method allows a quick color filling and in this case can also be used to add effect on a particular part of a render. It’s a really efficient way to get nice water or glass effects without having to lose time adjusting complex shader parameters, and it reduces a lot the rendering time.
Before applying the local effect and after the effect has been applied:
And finally your finished image…
Hope you enjoyed this tutorial and picked up some hints….